A novel ring tansfer reaction of furans to fused furans by tandem intramolecular Diels-Alder reaction and base-catalyzed ring-opening of the adducts has been developed.
Intramolecular azavinyl carbene-triggered rearrangement of furans
作者:Anton S. Makarov、Maxim G. Uchuskin、A. Stephen K. Hashmi
DOI:10.1039/c9sc02299f
日期:——
An intramolecular rhodium-catalyzed reaction of 1-tosyl-1,2,3-triazoles with furans has been explored. The tosylimino functionality was found to play a significant chemical role participating in the subsequent domino-transformations of a key reaction intermediate. One of the reaction pathways leads to valuable 2-formyl- and 2-acetylpyridine building blocks, which could be obtained in one-pot starting
Interrupted Furan–Yne Cyclization: Access to Unsaturated Dicarbonyl Compounds and Their Subsequent Transformation into Functionalized Pyridazines
作者:Yury A. Vasev、Ekaterina R. Nasibullina、Anton S. Makarov、Maxim G. Uchuskin
DOI:10.1021/acs.orglett.3c02794
日期:2023.11.3
The key carbenoidintermediate of transition-metal-catalyzed furan–yne cyclization in Hashmi phenol synthesis could be efficiently intercepted with water under the developed reaction conditions in order to provide access to functionalized unsaturated dicarbonyl compounds that might serve as convenient precursors for the straightforward synthesis of annulated pyridazines.